Anshelevich, Elliot, Onkar Bhardwaj, and John Postl. “Approximating Optimal Social Choice under Metric Preferences”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 1 (February 16, 2015). Accessed September 21, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/9308.